Installation, Package Management and Configuration
Services selection
One of the options in the System Setup.
Setup scripts tool
Rerun configuration scripts that were offered during installation. This is one of the options found in pkgtool.
Window Manager Selection
Here is how to select your window manager/desktop in Slackware - one of the options in the System Setup found in pkgtool.
pkgtool
pkgtool allows you to manage slackware packages and run the setup utility which is run during installation. This way you can change settings that you made during installation.